The cleanliness of the sex doll head directly affects the psychology of use. The latest antibacterial coating technology forms a nano-scale hydrophobic layer on the surface of the facial silicone, which, combined with the visually visible hydrophobic effect (water drop contact angle of 158°), can effectively alleviate the user's hygiene concerns. When this technology is extended to the entire body of the torso sex doll, the psychological safety threshold of the product is reduced by 31%, especially during the high incidence of infectious diseases.